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參數(shù)資料
| 型號： | USB3450-FZG |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | HI-SPEED USB HOST OR DEVICE PHY WITH UTMI+INTERFACE |
| 中文描述： | SERIAL COMM CONTROLLER, QCC40 |
| 封裝： | 6 X 6 MM, 0.90 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, MO-220, QFN-40 |
| 文件頁數(shù)： | 36/40頁 |
| 文件大?。?/td> | 1086K |
| 代理商： | USB3450-FZG |
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Hi-Speed USB Host or Device PHY With UTMI+ Interface
Datasheet
Revision 0.1 (05-11-05)
36
SMSC USB3450
DATASHEET
To detect the assertion of the downstream Chirp K's and Chirp J's for 2.5us {T
FILT
}, the Link must see
the appropriate LINESTATE signals asserted continuously for 165 CLKOUT cycles.
7.11
Assertion of Resume
In this case, an event internal to the device initiates the resume process. A device with remote wake-
up capability must wait for at least 5ms after the bus is in the idle state before sending the remote
wake-up resume signaling. This allows the hubs to get into their suspend state and prepare for
propagating resume signaling.
The device has 10ms where it can draw a non-suspend current before it must drive resume signaling.
At the beginning of this period the Link may negate SUSPENDN, allowing the transceiver (and its
oscillator) to power up and stabilize.
Figure 7.7
illustrates the behavior of a device returning to HS mode after being suspended. At T4, a
device that was previously in FS mode would maintain TERMSELECT and XCVRSELECT high.
To generate resume signaling (FS 'K') the device is placed in the "Disable Bit Stuffing and NRZI
encoding" Operational Mode (OPMODE [1:0] = 10), TERMSELECT and XCVRSELECT must be in FS
mode, TXVALID asserted, and all 0's data is presented on the DATA bus for at least 1ms (T1 - T2).
Table 7.8 HS Detection Handshake Timing Values from Suspend
TIMING
PARAMETER
DESCRIPTION
VALUE
T0
While in suspend state an SE0 is detected on the USB. HS
Handshake begins. D+ pull-up enabled, HS terminations
disabled, SUSPENDN negated.
0 (HS Reset T0)
T1
First transition of CLKOUT. CLKOUT "Usable" (frequency
accurate to ±10%, duty cycle accurate to 50±5).
T0 < T1 < T0 + 5.6ms
T2
Device asserts Chirp K on the bus.
T1 < T2 < T0 + 5.8ms
T3
Device removes Chirp K from the bus. (1 ms minimum width)
and begins looking for host chirps.
T2 + 1.0 ms < T3 <
T0 + 7.0 ms
T4
CLK "Nominal" (CLKOUT is frequency accurate to ±500
ppm, duty cycle accurate to 50±5).
T1 < T3 < T0 + 20.0ms
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相關(guān)代理商/技術(shù)參數(shù) |
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